Still injured: de Gea, Rooney, Darmian, Fellaini, Januzaj, Varela, Jones, Young, Schweinsteiger, Rojo, Valencia, and Shaw.
de Gea, Varela, Jones, and Januzaj all have a chance to be back for Arsenal, but de Gea is the only one likely to return straight away and make much of a difference, so it's the same squad for a few weeks yet.
Despite this, there are a few positions with competition for the place (mostly if Borthwick-Jackson is back). It could be Love or McNair at Right Back, or we could even see McNair or Carrick at Centre Back.
Herrera had a shocker in the last game, but do you play him here to both redeem himself and keep one of Carrick or Mata fresh for the return leg in the Europa League tie, or just leave him on the bench for the next three games on the trot?
Martial will probably start up front again, but there's still somehow competition on the flanks between Lingard, Memphis, Pereira and potentially even Mata.
In the FA Cup, in an Away game (even if they're the lowest ranked side left) we probably need the experience a little more than a Home game in the Europa League - however, Midtjyland is definitely the more important game for our season.
Romero
McNair Smalling Blind Borthwick-Jackson
Carrick Schneiderlin
Lingard Mata Memphis
Martial
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Henderson; Love, Poole; Riley, Herrera, Pereira; Keane
It's amazing to say I wouldn't be surprised if we're taken to a replay, but that's how bad we are at the moment.